<div>
  <h1>{{title}}</h1>
  <div class="header-bar"></div>
  <nav>
    <a routerLink="/dashboard" routerLinkActive="active">导航</a>
    <a routerLink="/heroes" routerLinkActive="active">英雄</a>
  </nav>
  <router-outlet></router-outlet>

  <hr>
  <number-pipe></number-pipe>
</div>